In comparison to the audio-only system, the video tracker in the second row in Tab. REF  unsurprisingly achieves a significant higher FR of 83.45%, due to its access to a highly informative modality, in line with its good benchmark results in other works [1]}, [2]}. Note that no threshold is needed for the video tracker, as its output is binary.
Additionally, the number of false positives per frame is lower, at 0.006. The LE is still below the size of one grid point with 19.95 pixels distance on average.
